Yes its on the shell. I am assuming that if I scrape too hard it will hurt the clam? Thanks for the advise.
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110 gal reef, homemade 30 gallon sump, 2x T5 HO 20,000, 2x Purple, 2x T5 Atinics, 50 lbs live sand/coral, 200 lbs live rock, Vertex in-80 skimmer, Danner Magdrive 700 pump, 2 clown fish, 1 coral beauty, 1 yellow tang, 1 purple headed goby, 1 Flame Angel, several other corals (can't remember the names 
plus a 55 gallon freshwater in the Kid's room
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